What an interesting copy of this book! Could you share more information with us about the book? It seems like, from the information you've provided, that this is STC 9282, which is described in the catalog records I've seen as a standard 8vo without any mention of large paper, and the copy reproduced in EEBO looks like a typical 8vo with its typical margins. Has this copy been inlaid or otherwise modified by an early owner? The tp looks like it's one sheet, but the image of the text looks like the paper of the printed area differs from the paper of the margins. How large is this book?

Thanks!